US2003626A - Universal measuring instrument - Google Patents

Description

June 4,

G. BozzER Er AL.

UNIVERSAL MEASURING INSTRUMENT Filed March 27, 1954 3 Sheets-Sheet 1 r l w l N v E N T o R S M0 June 4, 1935.

G. BozzER ET AL 2,003,626 UNIVERSAL MEASURING INSTRUMENT Filed March 27, 1934 I5 Sheets-Sheet 2 Het/4 60 5,

June 4, 1935. G. BozzER ETAL UNIVERSAL MEASURING INSTRUMENT s sheets-sheet s Filed March 27, 1934 mvENToRs M WI QMLQQMQLW.,

Patented June 4, 1935 PATENT OFFICE UNIVERSAL MEASRING INSTRUMENT George Bozzer and Julius Habersin,

Detroit, Mich.

Application March 27,v

6 Claims.

.Our invention relates to universal measuring instruments and its principal object is to provide a set of standard component parts which may be assembled in various ways so as to provide means for laying out, measuring, and checking work pieces of practically all of the various shapes and forms which are met with in regular tool-room and machine-shop practice.

Another object of our -said invention is to provide an instrument of the character referred to which is adapted for use with graduated and ungraduated rules, scales, and straight edges of various lengths and widths such as are commonly found in a tool-makers or machinists kit, so that a workman already possessing a standard kit of tools may, by adding thereto a set of our special component parts, put himself in a position to lay out, measure, and check an endless variety of work pieces Without the use of the numerous .expensive special instruments which are at present necessary in order to meet the exigencies of modern tool-room Work.

A further object Vof our said invention is to provide a universal instrument of the character referred to which is simple in construction, having regard to the multifarious purposes to which it may be applied, and which is so .constructed that its various forms of assembly may be effected in an accurate and dependable manner Without the necessity of more than `ordinary skill on the part of the operator.

With these rand other objects in view, the invention consists in the improved construction, arrangement, and combination of parts which will be hereinafter fully described, reference being had to the accompanying drawings, which illustrate a preferred embodiment thereof, in which drawings- Figure 1 is a plan view of the protractor section of our improved instrument shown in combination with a special multiple purpose scale, the various uses of which will be explained hereinafter. I

Figure 2 is a section on line 2-2 of Figure 1 with the exception of the scale which is shown complete in elevation.

Figure 3 is a plan View of the protractor section shown in combination with anordinary graduated rule together with a special rulegripping cam.

Figure 4 is a Vsection on line 4-4 of Figure 3.

VFigure 5 is a plan view of the cam.

. Figure 6 is a minor detail to be hereinafter referred to.

. Figure 7 is a diagram showing a common ap- 1934, Serial No. 717,630

plication of the protractor section in combination with the special multiple purpose scale.

Figure 8 is a diagram illustrating a combination of the protractor section with a common type or hook rule.

Figure 9 is a side elevation of a special wrench adapted for use with our improved instrument..

Figure 10 is an underside view of the same.

Figure 11 is a plan View showing the protractor section mounted upon a special base and lo combined with parallel scales of the ordinary type.

Figure l2 is a section on ure 11.

Figure 13 is a plan view showing the special base above referred to without the protractor section but combined with a Wide parallel scale of the ordinary type, the whole being adapted for laying out and checking ninety degree jobs.

Figure 14 is a section on line M-H of Fig- 2f ure 13.

Figure 15 is a fragmentary section on line l5-I5 of Figure 13, drawn to an enlarged scale, illustrating a clamping member, designated 38, to be hereinafter referred to.

Figure 16 is a'section on line lli- I6 of Figure l5.

Figure 17 is a plan view of said clamping member. l

Figure 18 is a fragmentary section. on line |8-I8 of Figure 14, drawn to an enlarged scale showing more clearly the construction of the adjustable support, to be hereinafter referred to.

Figure v19 is a section on line |9-I9 of Figure 18.

Like characters designate corresponding parts throughout the `several views.

' Our improved instrument comprises in its general organization three essential features as. follows:-

Firstly, a scale holder provided with means for holding scales of Vvarious types and sizes in dilferent .positions for use on ninety degree jobs.

Secondly, a protractor section to be used in v45 conjunction with the scale holder and adapted to holdY scales at various angles to the central axis of the said holder as determined by a graduated scale of degrees.

Thirdly, a `base adapted to support the scale holder With or without the protractor section, the said base being furnished in relatively large or small sizes according to the class of work to be handled.

The scale holder and the protractor section will now be described with particular reference to Figures l, 2, 3 and 4. is the body of the scale holder, in general of rectangular cross section, and provided with a transverse recess 2 adjacent its rear end bounded on one side by a vertical wall 3, the bottom of the recess and the face of the wall being accurately ground or lapped at right angles with the longitudinal axis of the body. Immediately forward of the recess E is a circular cavity 4 adapted to receive a hub 5 which is arranged concentrically therewith and rotatably mounted upon the screw 5, the said screw tting within the threaded bore'of the hub and having a plain portion journaled in the body as shown, while outside ofl the body is a knurled head 'l by which the screw may be manually rotated. Upon the upper surface of the hub 5 is a projecting portion 8 against which a scale of any kind may be set and held in po-v sition by a screw 9. Upon the hub 5 is also provided an arcuate member I arranged concentrically with the axis of the screw and provided' with aV pointer |il| which co-acts with graduations i0 representing angles of various degrees, the said graduations being marked upon the body i. The member I G, together with its pointer, is held in position by a cover i3 having lugs for the reception of screwsr |3| byV which it is secured to the body as shown more clearly in Figure 6 which is a section on line 6 6 of Figure.. l, the pointer sliding freely betweenrthe body and the cover and being locked in any desired position by the bolt |02 which is riveted to the pointer and passes through an arcuate slot vHIS so that it may be set at any desired angle, after ,which the thumb nut |04 is tightened, thereby securingthe pointer in place.

In order to facilitate the setting of the parts tovarious angles,l there are provided auxiliary graduations |2 upony the edge of the cover I3.

From this description it will be understood that a scale of any kind being set up against the surface 8 and clamped in position by the screw 9 may, by moving the member i0 about the center of the screw 6, be set at various angles as determined bythe position of the pointer |0|. y In the example illustrated in Figures 1 and 2 there is shown a special type of scale `which,

forms part of the present invention and which is provided with a. pair of graduated arms i4, l5 arranged in parallel spacedv relation, the arm |5 being provided .with a bevelled edge |5| and the arm lli having an oiset portion |4| of rel-l atively lnarrow width,ithe1use of which will appear later.

In the example shown in FiguresV 3 and 4, the scale holder is shown in conjunction with a parallel scale |5 which may be of any desired length and of. various standard widths. In this ar-4 rangement there is superposed upon the cover |3'a member 28, the said member being heldin place by being tightly fitted over the upperpor-v tionof theY member |51, adjacent the hub 5, and further securedy by the screw 9, the head of which engages in a slot inits rear end'. Upon the rearend of the member 28 is aprojecting ridge 29, the surface 3|)` of which is "ground accurately to provide an aligningjsurface-.for the Y scale i6. In order to hold the scale against this surface and lock the same in position, there is provided a cam l'lwhich is rotatablyqmounted upon the pin' I8,A the said pin being held stationary in the member 28 by riveting or othermeans,

' and rotation of the cam is effected manually by the knurled head I9 spot-welded or otherwise secured to the same, the parts being locked in the desired position in a rotary sense by the clamping nut upon the threaded end of the pin I8.

The cam in the example shown is provided with four projections 2|, 22, 23, 24, each of the said projections having a different radius so that the cam may be employed to clamp four diiferent widths of standard scales or blades such as the 1/2 inch, inch, 5/8 inch, and inch. Any of these scales in the example shown may be set at various angles up to twenty-five degrees on either side of the longitudinal axis of the body as will be understood by reference to the plan View Figure 3. In Figures 7 and 8 are shown two examples illustrating the use of the scale holder, Figure '7 showing the combination with the special scale, as in Figures l and 2, as applied to the checking of a bevelled surface in a workpiece 25, while Figure 8 shows the checking of a right angled job by means of a standard hook rule 2 held in the transverse recess 2, and in contact with the wall 3.v By reference to Figure 7 it will be observed that the narrow oset portion upon the arm |4 of the special scalewould be very useful where the opening in the piece to be measured was relatively narrow. c

-In the arrangement shown in Figures 11 and l2 the scale holder, together with the protractor section, ismcunted on a base 3|. This base is of similar construction at its forward end to that of thebase |.l previously described, that is to say,.it has' anopening for the reception of the hub 5 of the protractor and also an arcuate slot for the reception of the locking bolt |92, as well as the necessary graduations I0 which co-act with the pointer i The protractor, as a whole, is of the same construction throughout as described with reference to Figures lY and 2 with the exception that in place of the pivotal screw 6 therein shown, we employ a special form ofV screw 32. This screw is secured tightly in the hub 5 and is normally pressed downwards by a small helical spring 33.` so as to yieldably press the hub in a downward direction and maintain the pointer 0| in frictional contact with its seat upon the base.. The amount of friction between the parts may be varied by turning the screwplug 34 which is threaded into the base and is capable of being forced upwards against the head of the screw 32, as will be understood.

In the arrangement now under discussion we have shownl a narrow scale 35 which is arranged for use on right-angled work, beingY secured against the vertical face 3B upon the base, this face occupying a position, relative to the axis of the hub 5, similar to that of the face 3 in Figure l.` We, have also shown a narrow scale 31 which is, secured to the surfaces of the protractor section by the screw 9 in the same way as shown in Figures l and 2, by reference to which it will be noted that this latter scale may be set to various angles Vas determined by the position of thepointer Ilil Y It will be observed that' the base 3| may in some cases be made of very large dimensions for use upon work of greater magnitude than usual, andin such cases the right-angled scale 35 might also be of considerable length and relatively heavy. In order, therefore, tol provide amore substantial; and, moreV accurately adjustable means for securing the scale. in position against the accurately ground mating edge 38 upon the:

base there is provided a` special clampingarm 38which is secured to the upper face of `the base 3l by a forwardfbolt 39 fixed in the base and having a clamping nut 46 and bya rear bolt 4| also xed in the base and having the clamping nut42. These bolts engage in slots .43, 44 in the arm 38 so lthat the latter is capable of sliding longitudinally in relation to the base, such sliding movement being eifected by means of a pin 45 pivotally mounted in the base and having at its upper end and excentric head 45 which engages in a transverse slot '41 in the arm, turning of the excentric being effected by means of a collar 48 secured to the lower end ofthe pin 45 by a screw 49, there being provided a square openingr 5!) in the collar which is adapted to receive a suitable key or wrench. The screw-plug 34 is also provided with a square opening, not shown, adapted for wrench operation.

In Figures 9 and l0 is illustrated a very convenient form of key cr wrench, the body 5| of which is in general of T-shape having a stem or central portion 52 of square cross section adapted to iit within and engage the square opening in the screw-plug 34, while upon the said stem is arranged a sleeve 53 slidable longitudinally thereupon and terminating at its lower end in a squared portion 54 adapted to engage the square opening 50 in the collar 43. The sleeve 53 is normally in the position shown in Figure 9 but is capable of being slid downwards over the square portion 52 of the stem so that the square portion 54 is col-terminal therewith, at which time the squared portion 54 is in a position convenient for operating the collar 46 and with it the excentric 46. In order to protect the excentric 46 and prevent access of dirt intov the slot 41, there is provided a cover 55 which is secured in position by spot-welding or other means.

In Figures 13 and 14 the base 3| is shown in conjunction with a relatively wide and heavy scale referred to above, and in order to properly hold this scale as well as the narrow scale 35 tightly against the face 3S upon the base, there is provided upon the clamping arm 38 a member 56 having a pair of jaws 51, shown more in detail in Figures l5, 16, and 17, adapted to slide in inclined grooves 58 in the member 38 and provided at their lower ends with serrations 59 adapted to frictionally engage the scale 35 or 35|, as the case may be, and, due to its inclined position relative to the surface of the scale, to force the same downwardly and rearwardly so as to force it into proper' alignment with the said face 36. Downward movement of the jaws 51 is effected by means of the screw E0 which engages in a tapped hole in the arm 38 and is journaled in the member 55, as indicated at 6I,` and provided with collars 62, 63 in such manner that by rotation of the knurled head 64 the member 56 is moved up- Y wards or downwards as required. Upon the undersurface of the arm 38 is provided a downwardly projecting ridge 65 which presses upon the scale 35| and serves to keep it in engagement with the face 66 of the base 3l. It will be observed that since the scales used with our improved instrument will, for the most part, be hardened, great care must be taken to ensure that no slip occurs between the said scales and the parts with which they are held in contact. In order, therefore, to augment the gripping action there is provided an equalizer member 61, shown more in detail in Figures 18 and 19, which occupies a recess 68 in the face'SB-andis provided -'witlixa serrated 'por-'r tion 69k upon which the scale` 35i rests. The member 61 is mounted upon the screw.32 hereinbefore referred to, by vrotation of which it may be raised and lowered through a' slight distance, so that the `member 61 can 'teeter around the end of Ythelscrewfand thus Aequalize the pressure between itand the serrated member 51 upon t'ne upper side of the Scale. Thus.' by'y properI manipulation of the member 56 and the member 61 and--atthe -sametime rotating the excentric 46, a very perfect 'adjustment of the scale 35i is provided, so that it isprcperly aligned with the face 36 upon the baseill.` l

While we `have hereinbefore described and shown a preferred embodiment of our saidf-in'- vention, it will be readily understood byrthose skilled in the art to which the'invention relates that the same may be modified in various Ways to suit any particular or peculiar requirement without departing lfrornthe spirit of our invention. v

Havingthus described our said invention, what we claim and desire'to secure by Letters Patent of the United States is: I

l. An instrument of the character described comprising a body havingfan arcuate portion' having graduations thereupon, a pivot concentric therewith, a member swingably mounted upon said pivot and having a pointer adapted to register with said graduations for adjustment to various angles relative to said body, a facing projecting from said body at right angles to the longitudinal axis of the same and adapted to co-act with a scale, means for holding said scale in contact with said facing, a facing upon s aid swingable member adapted to coact with a scale, and means for yholding said last-mentioned scale in contact with said lastmentioned facing, whereby said last-mentioned scale may be adjusted to various angles relative to the longitudinal axis of said body.

2. An instrument of the character described comprising a body having an arcuate portion having graduations thereupon, a pivot concentric therewith, a member swingably mounted upon said pivot and having a pointer adapted to register with said graduations for adjustment to various angles relative to said body, aiY

facing projecting from said body at right angies to the longitudinal axis of the same and adapted to co-act with a scale, means for holding said scale in contact with said facing, a facing upon said swingable member adapted to co-act with a scale, and cam means for holding said last-mentioned scale in contact with said last-mentioned facing, whereby said lastmentioned scale may be adjusted to various angles relative to the longitudinal axis of said body.

3, An instrument of the character described comprising a body having an arcuate portion having graduations thereupon,v a pivot-concentric therewith, a member swingably mounted upon said pivot and having a pointer adapted to register with said graduations for adjustment to various angles relative to said body, a facing projecting from said body at right angles to the longitudinal axis of the same and adapted to co-act with a scale, means for holding said scale in contact with said facing, a facing upon said swingable member adapted to co-act with a scale, and a cam pivoted upon said swingable member and having a plurality of cam surfaces of varying radius whereby scales of varying width may be held in contact with said lastmentioned facing, whereby said last-mentioned scale may be adjusted to various angles relative to the longitudinalr axis of said body.

4. An instrument of the character described comprisingl a base ,having an arcuate portion having graduations thereupon, a pivot concen-v tric therewith, a member swingably mounteduponrsaid pivot and having a pointer adapted to register Withsaid graduations for adjustment to various angles relative to said body afacing projecting from said body at right angles to the longitudinal axis of the same and adapted to co-act with a scale, means for holding said scale in contact with saidfacing, a facing uponsaid swingable `member adapted to co-act with a scale, and means for holding said last-mentioned scale in contact Withsaid last-mentioned facing, whereby said last-mentioned scale may be adjustedto various angles relative tothe longitudinal axis of said body.

5. An instrument of the character described comprising a base having a facing projecting from the same at right angles to its longitudinal axis, a scale adapted to co-act with said facing,

and means for holding said scale in contact with said facinggsaid means including an arm slidably mountedV upon said base, eccentric means for moving said arm longitudinally of same simultaneously against said facing and said surface.

6.V An instrument of the character described comprising a base having a facing projecting from the same at right angles to its longitudinal axis, a scale adapted to co-act with said facing and said base, and means for holding said scale in position, said means including an adjustable equalizing member upon the upper surface of said base adapted to support said scale, an arm slidably mounted upon said base and overhanging said member, a pair of opposed grooves in said arm disposed at an angle to said facing and to said upper surface, and a member slidably adjustable insaid grooves and adapted to frictionally engage said scale and to press the same simultaneously against said facing and said equalizing member.

GEORGE BOZZER.

J ULIUS I-IABERSIN

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